科研绘图完整复制01:机器学习回归问题常用验证图——散点密度/频率图画法-完整MATLAB代码及origin操作
画图基本思路:准备数据,画图首先准备数据:统计散点频率%频率统计x = chuntian(:,1);y = chuntian(:,2);%max(c(:,1))Xedges = 0:500;Yedges = 0:500;N = histcounts2(x,y,Xedges,Yedges)sum(sum(N))x_cent_point = [0.5:1:499.5];y_cent_point = [
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画图基本思路:准备数据,画图
首先准备数据:
统计散点频率
%频率统计
x = chuntian(:,1);
y = chuntian(:,2);
%max(c(:,1))
Xedges = 0:500;
Yedges = 0:500;
N = histcounts2(x,y,Xedges,Yedges)
sum(sum(N))
x_cent_point = [0.5:1:499.5];
y_cent_point = [0.5:1:499.5];
n = 0;
for i = 1:500
for j = 1:500
n = n + 1;
x_p(n) = x_cent_point(i);
y_p(n) = y_cent_point(j);
z_p(n) = N(i,j);
end
end
result = [x_p', y_p', z_p'];
保存结果result,EXCEL里去掉频数是0的行。
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